11687851 has 8 divisors (see below), whose sum is σ = 13379040. Its totient is φ = 10002048.

The previous prime is 11687843. The next prime is 11687861. The reversal of 11687851 is 15878611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11687851 - 2³ = 11687843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11687851.

It is not an unprimeable number, because it can be changed into a prime (11687801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5985 + ... + 7693.

It is an arithmetic number, because the mean of its divisors is an integer number (1672380).

Almost surely, 2^11687851 is an apocalyptic number.

11687851 is a deficient number, since it is larger than the sum of its proper divisors (1691189).

11687851 is an equidigital number, since it uses as much as digits as its factorization.

11687851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693.

The product of its digits is 13440, while the sum is 37.

The square root of 11687851 is about 3418.7499177331. The cubic root of 11687851 is about 226.9402638652.

The spelling of 11687851 in words is "eleven million, six hundred eighty-seven thousand, eight hundred fifty-one".